UCC28880集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

UCC28880属于集成电路（IC）的ACDC转换器离线开关。由德州仪器制造生产的UCC28880AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。

1 Features

• Integrated Power MOSFET (Switch) Rated to

700-V Drain-to-Source Voltage

• Integrated High-Voltage Current Source for

Internal Low-Voltage Supply Generation

• Soft Start

• Self-Biased Switcher (Start Up and Operation

Directly from Rectified Mains Voltage)

• Supports Buck, Buck-Boost and Flyback

Topologies

• <100-μA Device Quiescent Current

• Robust Performance with Inductor Current

Runaway Prevention

• Thermal Shutdown

• Protection

– Current Limit

– Overload and Output Short Circuit

• Create a Custom Design Using the UCC28880

with the WEBENCH Power Designer

2 Applications

• AC-to-DC Power Supplies

(Output Current Up to 100 mA for CCM;

70 mA for DCM)

• Metering, Home Automation, Infrastructure SMPS

• Low-Side Buck Topology for TRIAC Driver

• Appliances, White Goods and LED Drivers

3 Description

The UCC28880 integrates the controller and a 700-V

power MOSFET into one monolithic device. The

device also integrates a high-voltage current source,

enabling start up and operation directly from the

rectified mains voltage.

The low quiescent current of the device enables

excellent efficiency. With the UCC28880 the most

common converter topologies, such as buck, buckboost

and flyback can be built using a minimum

number of external components.

The UCC28880 incorporates a soft-start feature for

controlled start up of the power stage which

minimizes the stress on the power-stage

components.